/Engine/Plugins/Editor/UVEditor/Source/UVEditorTools/Public/ToolTargets/UVEditorToolMeshInput.h
Updates the preview meshes from their canonical counterparts. Useful mainly as a way to reset the previews.
void UpdatePreviewsFromCanonical ( const [TArray](API\Runtime\Core\Containers\TArray)< int32 > * ChangedVids, const [TArray](API\Runtime\Core\Containers\TArray)< int32 > * ChangedConnectivityTids, const [TArray](API\Runtime\Core\Containers\TArray)< int32 > * FastRenderUpdateTids )